CN219702740U - Vacuum cleaning system - Google Patents

Abstract

The present utility model relates to a vacuum cleaning system. The vacuum cleaning system includes: the air inlet channel is provided with a plurality of suction ports and a first pressure sensor; the air outlet channel is provided with a second pressure sensor and an air supplementing device; the dust remover is respectively connected with the air inlet channel and the air outlet channel; the variable-frequency multistage centrifugal fan is connected with the air outlet channel and is used for generating working air flow; and the controller is configured to reduce the frequency of the multistage centrifugal fan when the pressure value detected by the first pressure sensor is larger than a set value, and to control the air supplementing device to be opened when the frequency of the multistage centrifugal fan is reduced to a limiting frequency and if the pressure value detected by the second pressure sensor exceeds a set pressure threshold value, the frequency of the multistage centrifugal fan with variable frequency is kept unchanged. The vacuum cleaning system can ensure that the frequency of the multistage centrifugal fan is always above a limiting frequency and the pressure in the air suction pipeline is ensured to be within a safe range.

Description

Vacuum cleaning system

Technical Field

The utility model relates to the field of cleaning, in particular to a vacuum cleaning system.

Background

The vacuum cleaning system is a stable, convenient and efficient dust treatment system, is mainly used for cleaning excessive dust in the material transportation process and dust remained on the ground, corners or equipment surfaces in the maintenance and overhaul process, and the dust not only pollutes the surrounding environment and endangers the physical health of workers, but also can cause safety accidents such as explosion and the like, so that the dust needs to be trapped and treated, and serious consequences are avoided. The vacuum cleaning system is particularly suitable for places with large area and large dust amount, and compared with the traditional cleaning modes such as hydraulic cleaning, manual cleaning and the like, the vacuum cleaning system has wider acting surface and more flexible arrangement, can collect and treat dust in a concentrated manner, and has convenient cleaning and remarkable effect.

Currently, vacuum cleaning systems consist of a pre-cyclone separator, a dust collector, a control system, a power system, a cleaning piping system and a cleaning operation assembly. When the system is in operation, dust is sucked into the vacuum tube through the suction port, and the sucked dust is sucked into the cyclone separator along the negative pressure pipeline along with airflow under the action of vacuum negative pressure. Firstly, large-particle dust passes through a front cyclone separator, falls into an ash bucket below the cyclone separator under the action of centrifugal force, and continuously moves upwards along with airflow, when the dust enters a filter chamber of the dust remover, the dust is separated by a filter device such as a filter cylinder or a filter bag, clean air is discharged into the air through a power system from an air outlet of the dust remover, and the dust on the filter device is removed by timing back blowing alternate work of an automatic pulse back blowing device.

The power system of the vacuum cleaning system usually adopts a Roots vacuum pump, and has the greatest advantages of self-adaptive capacity, and can automatically adjust the pressure loss value running along with the number and the position of different cleaning points to a required wind pressure value, so that the working characteristics of small wind volume change and large pressure change of the vacuum cleaning system are better matched, but after a filter device is damaged, dust can enter the Roots vacuum pump and abrade the vacuum pump, so that the performance of the Roots vacuum pump is reduced, the noise is continuously increased, and the Roots vacuum pump is difficult to repair.

Therefore, the variable-frequency multistage centrifugal fan with low noise is commonly used for replacing the Roots vacuum pump, the multistage centrifugal fan is different from the Roots vacuum pump, the wind pressure and the wind quantity of the multistage centrifugal fan are changed along with the change of the number and the position of dust collection points of the system, the change range is large, the coupling relation between the wind quantity and the wind pressure of the multistage centrifugal fan is between the Roots vacuum pump and the high-pressure centrifugal fan, the wind pressure of the multistage centrifugal fan is superior to that of a common high-pressure fan, but the self-adaptive matching degree between the wind quantity and the wind pressure of the Roots vacuum pump is not achieved, and therefore certain measures are required to be taken to ensure the stable and safe operation of the system.

In order to accurately adjust the frequency of a fan, the utility model patent CN212896088U describes a vacuum cleaning system, which comprises a fan, a dust remover, a main control chip, a frequency converter, an air supply pipeline and a plurality of dust collection tools, wherein a switch assembly is arranged at the joint of each dust collection tool and the air supply pipeline. When the main control chip detects that the started target switch assemblies exist in all the switch assemblies, determining target fan frequency corresponding to the target switch assemblies from a preset database to control the frequency converter to adjust the fan rotating speed according to the target fan frequency, wherein the fan frequency is obtained by measuring the target switch assemblies after being opened in advance.

By adopting the technical scheme of the utility model, the working frequency of the frequency converter can be regulated and controlled, the electric energy is saved to the maximum extent, the system operation cost is reduced, and the operation effect of the vacuum cleaning system is maximized.

Therefore, although the above scheme can accurately adjust the frequency of the fan and improve the energy-saving effect, the system must be ensured to be above a certain wind pressure design value to meet the wind quantity required by the limit position from the near end to the far end of the cleaning point due to the characteristics of the wind quantity of the vacuum cleaning system and the larger change of the position between the farthest end and the near end, but the wind pressure characteristic of the multistage centrifugal fan cannot be realized. In addition, because this scheme all sets up switch module in every dust extraction tool and air supply pipeline's junction, and need pass through loaded down with trivial details calculation test stage when predetermining the database, consequently, the preposed program that predetermines sets up loaded down with trivial details, and need set up a plurality of switch modules and lead to with high costs, simultaneously, when the staff forgets to turn on switch module or switch module inefficacy, still has the problem that the system that the amount of wind is not enough to lead to can not stable work.

In addition, the existing vacuum cleaning system is provided with two dust collectors, namely a cyclone separator and a dust collector, and is high in cost and occupies space. Meanwhile, the vacuum cleaning system has a large number of pipelines, and the untimely cleaning can cause blockage, so that the using effect is affected. In addition, the safety measures adopted are too single, the emergency situation cannot be dealt with, and once the system fails, safety accidents such as equipment damage and the like can occur when the pressure exceeds a critical value.

Disclosure of Invention

Based on the above-mentioned drawbacks in the prior art, an object of the present utility model is to provide a vacuum cleaning system, which can automatically adjust the frequency of a multi-stage centrifugal fan, and can ensure that the frequency of the multi-stage centrifugal fan is always above a limited frequency and the pressure in an air suction pipeline is within a safe range, so as to ensure that the system can operate stably and safely.

Therefore, the utility model provides the following technical scheme.

The present utility model provides a vacuum cleaning system, comprising: the air inlet assembly comprises an air inlet channel, and a plurality of suction ports and a first pressure sensor are arranged on the air inlet channel; the air inlet assembly comprises an air outlet channel, and a second pressure sensor and an air supplementing device are arranged on the air outlet channel; the dust remover is respectively connected with the air inlet channel and the air outlet channel; the variable-frequency multistage centrifugal fan is connected with the air outlet channel and is used for generating working air flow; and the controller is configured to reduce the frequency of the multistage centrifugal fan to a preset value when the pressure value detected by the first pressure sensor is larger than a set value, and to control the air supplementing device to be opened if the frequency of the multistage centrifugal fan is reduced to a limited frequency and the pressure value detected by the second pressure sensor exceeds a set pressure threshold value. In at least one embodiment, the air make-up device includes a first air make-up valve, the pressure threshold includes a first threshold, and the controller controls the first air make-up valve to open when the pressure value detected by the second pressure sensor exceeds the first threshold.

In at least one embodiment, the air make-up device further comprises a second air make-up valve, the pressure threshold further comprises a second threshold, and the controller controls the second air make-up valve to open together when the pressure value detected by the second pressure sensor exceeds the second threshold, wherein the second threshold is greater than the first threshold.

In at least one embodiment, the air inlet channel is also connected with an explosion-proof valve, and the dust remover is connected with an explosion release sheet.

In at least one embodiment, the air inlet channel comprises a main suction channel and a plurality of branch channels, one end of each branch channel is connected with the main suction channel, the other end of each branch channel forms a suction port, and the tail end of each main suction channel is provided with a sweeping valve.

In at least one embodiment, the dust collector is a filter bag dust collector or a cartridge dust collector, and the dust collector is integrated with a cyclone structure.

In at least one embodiment, the controller is further configured to control the flameproof valve to automatically close while controlling the rupture disc to automatically open when the pressure value detected by the first pressure sensor exceeds a third threshold value.

In at least one embodiment, the vacuum cleaning system further comprises an alarm coupled to the controller, the controller further configured to control the alarm to alarm and to control the variable frequency multistage centrifugal fan to stop when the pressure value detected by the second pressure sensor exceeds a fourth threshold, wherein the fourth threshold is greater than the second threshold.

In at least one embodiment, a muffler is connected to the variable frequency multistage centrifugal fan.

In at least one embodiment, a suction opening valve is provided at the suction opening.

Advantageous effects

According to the vacuum cleaning system, the first pressure sensor is arranged on the air inlet channel, the second pressure sensor and the air supplementing device are arranged on the air outlet channel, so that the frequency of the multistage centrifugal fan can be automatically adjusted and reduced according to the detection result of the first pressure sensor, the pressure in an air suction pipeline can be reduced, the working energy consumption is saved, the frequency of the multistage centrifugal fan is set to be above a limiting frequency, the system can normally operate when the cleaning points in different numbers and positions work, and further, when the frequency of the multistage centrifugal fan is reduced to the limiting frequency, if the pressure value detected by the second pressure sensor exceeds the set pressure threshold value, the frequency of the multistage centrifugal fan with variable frequency is kept unchanged, the air supplementing device is controlled to be opened, the air is supplemented into the air outlet channel, the pressure of the system is reduced, and the system can be further ensured to stably and safely operate.

Drawings

Fig. 1 shows a schematic construction of a vacuum cleaning system according to the utility model.

Description of the reference numerals

1. An air inlet assembly; 11. an air inlet channel; 12. a suction port; 13. a first pressure sensor; 14. a main suction channel; 15. a bypass channel; 16. a purge valve; 17. an explosion-proof valve;

2. a dust remover; 21. explosion venting sheets;

3. an air outlet assembly; 31. an air outlet channel; 32. a second pressure sensor; 33. an air supplementing device; 331. a first air compensating valve; 332. a second air compensating valve;

4. a multistage centrifugal fan;

5. a muffler.

Detailed Description

In order to make the technical scheme and the beneficial effects of the utility model more obvious and understandable, the following detailed description is given by way of example. Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

In the description of the present utility model, unless explicitly defined otherwise, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience of simplifying the description of the present utility model, and do not indicate that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, i.e., are not to be construed as limiting the present utility model.

In the present utility model, the terms "first", "second" are used for descriptive purposes only and are not to be construed as relative importance of the features indicated or the number of technical features indicated. Thus, a feature defining "first", "second" may explicitly include at least one such feature. In the description of the present utility model, "plurality" means at least two; "plurality" means at least one; unless otherwise specifically defined.

In the present utility model, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly, unless otherwise specifically limited. For example, "connected" may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, or can be communicated between two elements or the interaction relationship between the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless explicitly defined otherwise, a first feature "on", "above", "over" and "above", "below" or "under" a second feature may be that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact via an intermediary. Moreover, a first feature "above," "over" and "on" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the level of the first feature is higher than the level of the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the level of the first feature is less than the level of the second feature.

A specific embodiment of the vacuum cleaning system according to the present utility model is described in detail below with reference to fig. 1.

In this embodiment, as shown in fig. 1, the vacuum cleaning system according to the present utility model includes an air intake assembly 1, a dust collector 2, an air outlet assembly 3, and a multi-stage centrifugal fan 4, the air intake assembly 1 includes an air intake passage 11, a plurality of suction ports 12, and a first pressure sensor 13, and the air outlet assembly 3 includes an air outlet passage 31, a second pressure sensor 32, and an air supplementing device 33.

Wherein, be provided with a plurality of suction ports 12 and first pressure sensor 13 on the air inlet passageway 11, be provided with second pressure sensor 32 and air compensating device 33 on the air outlet passageway 31, dust remover 2 is connected with air inlet passageway 11 and air outlet passageway 31 respectively, and multistage centrifugal fan 4 is connected with air outlet passageway 31 for produce the working air current.

The vacuum cleaning system further comprises a controller (not shown in fig. 1) configured to decrease the frequency of the multi-stage centrifugal fan 4 when the pressure value detected by the first pressure sensor 13 is greater than a set value, and thus, the frequency of the multi-stage centrifugal fan 4 can be automatically adjusted when the system pressure is excessive.

The wind pressure and the wind quantity of the multistage centrifugal fan 4 change along with the change of the number and the positions of the cleaning points, the change range is larger, and the system must be ensured to be above a certain wind pressure design value to meet the wind quantity required by the limit position from the near end to the far end of the cleaning points, so that the frequency of the multistage centrifugal fan 4 is set above a limiting frequency f1, and the system can normally operate when the cleaning points in different numbers and positions work.

Further, when the frequency of the multistage centrifugal fan 4 is reduced to the limiting frequency f1, the pressure value detected by the second pressure sensor 32 exceeds the set pressure threshold value, the frequency of the variable-frequency multistage centrifugal fan 4 is kept unchanged, the air supplementing device 33 is controlled to be opened, air is supplemented into the air outlet channel, the pressure in the air suction pipeline is reduced, and the stable and safe operation of the system is further ensured.

Through adopting above-mentioned technical scheme, can the frequency of automatically regulated multistage centrifugal fan 4 to can make the frequency of multistage centrifugal fan 4 be in one all the time to the pressure in the pipeline of breathing in the safety range when prescribing a limit to more than frequency f1, and then guarantee that the system can be stable and safe operation.

In one embodiment, as shown in fig. 1, the air compensating device 33 includes a first air compensating valve 331, the pressure threshold includes a first threshold, and the controller controls the first air compensating valve 331 to be opened when the pressure value detected by the second pressure sensor 32 exceeds the set first threshold. Wherein the first threshold may be 35KPa.

In one embodiment, as shown in fig. 1, the air compensating device 33 further includes a second air compensating valve 332, and the pressure threshold further includes a second threshold, and the controller controls the second air compensating valve 332 to be opened together when the pressure value detected by the second pressure sensor 32 exceeds the set second threshold, wherein the second threshold is greater than the first threshold. Wherein the second threshold may be 40KPa.

By the above configuration, the intake air amount of the air supply device 33 can be adjusted and controlled, and only the first air supply valve 331 is selectively opened or the first air supply valve 331 and the second air supply valve 332 are opened together according to the difference in the pressure value detected by the second pressure sensor 32.

In an embodiment, the air inlet channel is also connected with an explosion-proof valve 17, and the dust remover 2 is connected with an explosion release sheet 21. When the abnormal condition occurs in the dust remover 2 and the pressure value exceeds the set threshold value, specifically, when the pressure value detected by the first pressure sensor 13 exceeds the third threshold value, the explosion-proof valve 17 on the air inlet channel 11 can be automatically closed to thoroughly isolate the dust remover 2 from a workshop station point, and meanwhile, the explosion release piece 21 on the box body of the dust remover 2 can be automatically opened to release pressure, so that the explosion occurrence probability is reduced, and the safety of system operation is improved.

In one embodiment, the air intake passage comprises a main suction passage 14 and a plurality of branch passages 15, one end of each branch passage 15 is connected with the main suction passage 14, the other end forms a suction port 12, and the tail end of the main suction passage 14 is provided with a purge valve 16.

Through the above-mentioned structure setting, when the dust is piled up in the pipeline, the system opens the scavenging valve 16 voluntarily, carries out the pipeline clearance. In addition, a timing ash removing mode can be set in the dust remover 2, and after the cleaning valve 16 is closed, an ash removing program can be automatically started to automatically remove ash for a period of time, so that the pipeline can be prevented from being blocked, and the dust remover 2 can always maintain running in the cleaning process.

In an embodiment, the dust remover 2 is a filter bag dust remover or a filter cartridge dust remover, and the dust remover 2 is integrated with a cyclone separation structure, so that the dust remover 2 has a cyclone function and saves cost and occupied space due to the fact that the cyclone separator is omitted.

It will be appreciated that the dust collector 2 is not limited to a bag collector or a cartridge dust collector, but may be of other construction.

In one embodiment, the vacuum cleaning system further comprises an alarm (not shown in fig. 1), which is connected to the controller, and when the pressure value detected by the second pressure sensor 32 exceeds the fourth threshold value, the controller controls the alarm to generate an audible and visual alarm, and controls the multistage centrifugal fan 4 to automatically stop so as not to cause a safety accident. The fourth threshold is greater than the second threshold, which may be 41KPa, for example.

In one embodiment, a muffler 5 is connected to the variable frequency multistage centrifugal fan 4, thereby reducing noise generated when the multistage centrifugal fan 4 is operated.

In one embodiment, a suction port valve is provided at the suction port 12 for controlling the opening and closing of the suction port.

It should be understood that the above embodiments are exemplary and not intended to encompass all possible embodiments encompassed by the claims. Various modifications and changes may be made in the above embodiments without departing from the scope of the utility model. Likewise, the individual technical features of the above embodiments may also be combined arbitrarily to form further embodiments of the utility model which may not be explicitly described. Therefore, the above embodiments merely represent several embodiments of the present utility model, and do not limit the scope of the present utility model.

Claims (10)

1. A vacuum cleaning system, the vacuum cleaning system comprising:

the air inlet assembly comprises an air inlet channel, and a plurality of suction ports and a first pressure sensor are arranged on the air inlet channel;

the air outlet assembly comprises an air outlet channel, and a second pressure sensor and an air supplementing device are arranged on the air outlet channel;

the dust remover is respectively connected with the air inlet channel and the air outlet channel;

the variable-frequency multistage centrifugal fan is connected with the air outlet channel and is used for generating working air flow;

and the controller is configured to reduce the frequency of the multistage centrifugal fan when the pressure value detected by the first pressure sensor is larger than a set value, and control the air supplementing device to be opened if the pressure value detected by the second pressure sensor exceeds a set pressure threshold value when the frequency of the multistage centrifugal fan is reduced to a limited frequency.

2. The vacuum cleaning system of claim 1, wherein the air make-up device comprises a first air make-up valve, the pressure threshold comprises a first threshold,

the controller controls the first air supplementing valve to open when the pressure value detected by the second pressure sensor exceeds the first threshold value.

3. The vacuum cleaning system of claim 2, wherein the air make-up device further comprises a second air make-up valve, the pressure threshold further comprises a second threshold,

the controller controls the second supplemental valve to open together when the pressure value detected by the second pressure sensor exceeds the second threshold, wherein the second threshold is greater than the first threshold.

4. The vacuum cleaning system of claim 1, wherein the air inlet channel is further connected with an explosion-proof valve, and the dust remover is connected with an explosion-release sheet.

5. The vacuum cleaning system of claim 4, wherein the controller is further configured to control the flameproof valve to automatically close while controlling the rupture disc to automatically open when the pressure value detected by the first pressure sensor exceeds a third threshold value.

6. The vacuum cleaning system according to claim 1, wherein the air intake passage comprises a main suction passage and a plurality of branch passages, one ends of the branch passages are connected with the main suction passage, the other ends form the suction port, and the end of the main suction passage is provided with a cleaning valve.

7. Vacuum cleaning system according to claim 1, characterized in that the dust collector is a bag dust collector or a cartridge dust collector, and that the dust collector is integrated with a cyclone structure.

8. The vacuum cleaning system of claim 3, further comprising an alarm, wherein the alarm is coupled to the controller,

the controller is further configured to control the alarm to alarm and control the variable frequency multistage centrifugal fan to stop when the pressure value detected by the second pressure sensor exceeds a fourth threshold value, wherein the fourth threshold value is larger than the second threshold value.

9. The vacuum cleaning system of claim 1, wherein a muffler is connected to the variable frequency multistage centrifugal fan.

10. Vacuum cleaning system according to claim 1, characterized in that the suction opening is provided with a suction opening valve.